Pyroclastic Material. Fragmented lava-derived material obtained from the effects of explosions or gas-liquid interactions in the column of an erupting volcano. (Free translation from the original: Material IV - Glosario de Protección Civil, OPS, 1992) . 1.00
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Pyrophoric Materials. Metals such as sodium, potassium, zirconium and others, which ignite on contact with air. (Free translation from the original: Material III - Ministério da Ação Social, Brasília, 1992) . 0.70
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Pyroclastic Flow. Nuee Ardent . Glowing Cloud . High density flow of solid volcanic fragments suspended in gas which flows downslope from a volcanic vent (at speed up to 200 km/h) which may also develop from partial collapse of a vertical eruption cone, subdivided according to fragment composition and nature of flowage into: ash flow, glowing avalanche, nuee ardent, pumice flow (Material II - IDNDR, 1992) . 0.61
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Materials. Set of machines, tools or objects of any kind necessary to the performance of a service or the practice of a profession. (Free translation from the original: Diccionario de la Lengua Española edición electrónica. Espasa-Calpe, S.A., 2000) . 0.56
Pyrola. Pyrolas . Shinleafs . Shinleaf . A plant genus of the family PYROLACEAE. The common name of wintergreen is more often used for GAULTHERIA. . 0.50
